Effect of different levels and combinations of lasalocid and monensin on broiler performance, water consumption, and prevention of coccidiosis
Patel, M.B.; Nam, C.W.; Bishawi, K.O.; McGinnis, J.
Poultry Science 59(7): 1649
The effects of feeding different levels and combinations of lasalocid (LA) and monensin (MO) (15 drug treatments) on chick growth and water consumption were studied in a 2 week battery trial and in a 7 week floor trial. In the floor pen trial, all chicks were given at 4 weeks of age a mixture of oocysts of E. acervulina/mivati, E. maxima, E. necatrix, and E. tenella mixed in the feed. In both trials increasing the level of MO alone or in combination with LA depressed growth. The MO decreased water intake. The LA alone or in combination with MO gave only a slight or no increase in water intake and did not affect growth. Sixteen chicks from each treatment in the floor pen trial were posted at 6 days postinfection to score for coccidiosis lesions. About 40% of the unsupplemented control chicks were dead by 6 days postinfection. With LA and MO alone coccidiosis mortality was 0 and 2%, respectively. None of the other treatments had more than 1% coccidiosis mortality. The lesion scores for the upper, mid-gut, and ceca for the unsupplemented control were 2.25, 2.06, and 1.38, respectively, out of 3.0. The LA and combinations with MO appeared to be more protective than MO alone based on lesion scores.